BDO vs Grant Thornton:Which is more popular?
In September 2026, Grant Thornton had more branded searches than BDO among accounting firms worldwide. Grant Thornton had about 246,000 branded searches, while BDO had 3,600. Grant Thornton made up 4.4% of all accounting firm searches we track, and BDO accounted for 0.06%. When we asked ChatGPT and Google AI Overviews about accounting firms, BDO appeared in one of the three answers and Grant Thornton in none.
Who do people search for more?
Grant Thornton, about 68 searches for every 1 for BDO
Who does AI mention more?
BDO, mentioned in 1 of 3 answers, Grant Thornton in 0
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Top accounting firms in ChatGPT and Google AI Overviews
In three ChatGPT questions, BDO was mentioned in one out of three: in one of the three ChatGPT answers. Grant Thornton did not appear in any of the three answers.
Mentioned by AI
Each dot is one answer, filled in when that answer mentions the brand.
Deloitte1 of 3Named in 1 of 3 ChatGPT answers
KPMG1 of 3Named in 1 of 3 ChatGPT answers
PwC1 of 3Named in 1 of 3 ChatGPT answers
EY1 of 3Named in 1 of 3 ChatGPT answers- BDO1 of 3Named in 1 of 3 ChatGPT answers
- Grant Thornton0 of 3Named in 0 of 3 ChatGPT answers
Forvis Mazars0 of 3Named in 0 of 3 ChatGPT answers
Baker Tilly0 of 3Named in 0 of 3 ChatGPT answers
See every answer about accounting firms
3 answers
Asked ChatGPT
“Which accounting firm should I hire?”
Asked ChatGPT
“What are the best accounting firms?”
Asked ChatGPT
“What's the best accounting firm for a small business?”
Searched Google, AI Overview
“accounting firms”
Google showed no AI Overview for this search.
Searched Google, AI Overview
“small business accountant”
Google showed no AI Overview for this search.
Not named in any answer:
Brands are shown in the order each answer named them. The survey took place in the United States on October 19, 2026.
Is BDO or Grant Thornton more popular in search?
This chart shows how often people search Google for BDO and Grant Thornton by name. Each line represents a brand's share of searches for all eight accounting firms we track, month by month, from English-language searches worldwide.
Share of searches by month for Grant Thornton, BDO. The figures are in the table below the chart.
View monthly share of searches table
| Month | Deloitte | KPMG | PwC | EY | Grant Thornton | Forvis Mazars | Baker Tilly | BDO |
|---|---|---|---|---|---|---|---|---|
| Oct 2025 | 32.3% | 21.5% | 17.7% | 17.4% | 4.3% | 4.2% | 2.4% | 0.08% |
| Nov 2025 | 34.2% | 18.7% | 18.7% | 17.9% | 4.6% | 3.9% | 2.1% | 0.07% |
| Dec 2025 | 28.1% | 19% | 23.1% | 18.6% | 4.6% | 3.9% | 2.5% | 0.07% |
| Jan 2026 | 29.7% | 19.8% | 19.8% | 19% | 4.9% | 4.1% | 2.7% | 0.07% |
| Feb 2026 | 29.6% | 19.7% | 19.7% | 18.9% | 4.9% | 4.4% | 2.7% | 0.07% |
| Mar 2026 | 29.7% | 19.8% | 19.8% | 19% | 4.9% | 4.1% | 2.7% | 0.07% |
| Apr 2026 | 29.7% | 19.8% | 19.8% | 19% | 4.9% | 4.1% | 2.7% | 0.06% |
| May 2026 | 31.5% | 21% | 17.3% | 20.1% | 4.2% | 3.6% | 2.3% | 0.06% |
| Jun 2026 | 29.8% | 24.2% | 16.3% | 19% | 4% | 3.9% | 2.7% | 0.06% |
| Jul 2026 | 32.3% | 21.5% | 17.7% | 17.4% | 5.3% | 3.4% | 2.4% | 0.06% |
| Aug 2026 | 31.5% | 21% | 17.3% | 20.1% | 4.2% | 3.4% | 2.3% | 0.06% |
| Sep 2026 | 32.6% | 21.7% | 17.8% | 17.1% | 4.4% | 4% | 2.4% | 0.06% |
How has the BDO and Grant Thornton comparison changed over the last 12 months?
3 findings
- Grant Thornton was ahead of BDO in every measured month of the 12 months ending September 2026.
- Across the 12 months ending September 2026, BDO’s share of searches among accounting firms worldwide moved from 0.08% to 0.06%, and its estimated monthly branded searches moved from 4.4K to 3.6K.
- Across the 12 months ending September 2026, Grant Thornton’s share of searches among accounting firms worldwide moved from 4.3% to 4.4%, and its estimated monthly branded searches held steady at 246K.
How did search popularity change for accounting firms worldwide in September 2026?
1 change
Estimated monthly branded searches for BDO worldwide fell 18.2% over 12 measured months, from 4.4K to 3.6K in September 2026.
How are branded searches counted?
2 search terms
Brandwave collects information about searches that people make online using BDO’s and Grant Thornton’s names. When viewed over time, estimated search volumes for these branded terms can be used to understand whether interest in the brands is growing, holding steady, or fading.
BDO
1 branded search term
- bdo accountants
Grant Thornton
1 branded search term
- grant thornton
Other head-to-heads among accounting firms
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